upload
United States Bureau of Mines
Industry: Mining
Number of terms: 33118
Number of blossaries: 0
Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources. Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
GeO<sub>2</sub>; melting point, 1,115 degrees C. This oxide is a glass former and provides some unique properties; e.g., greater dispersion, lower melting temperature, and higher transmissivity for infrared radiation. Some germanium oxide complexes and solid solutions have ferroelectric properties. Colorless; sp gr, 4.228 (at 25 degrees C); hexagonal; soluble in alkalies; and slightly soluble in acids and in water. Used as an ingredient of special glass mixtures.
Industry:Mining
Geochemical dispersion of elements by processes operating within the Earth. Compare: secondary dispersion
Industry:Mining
Geochemical dispersion of elements by processes originating at the surface of the Earth; opposite of primary dispersion. Secondary patterns are those formed at the Earth's surface by weathering, erosion, or surface transportation. Secondary patterns have been classified more in detail as halos, fans, and trains, depending on the characteristic shape of the pattern and its geometric relationship to the ore deposit or other source.
Industry:Mining
Geochemical prospecting term used by Russian authors for soil surveys or for the chemical analysis of systematically collected samples of soil and weathered rock.
Industry:Mining
Geochronology in which the time-order is based on absolute age, usually measured in years by radiometric dating, rather than on superposition and/or fossil content as in relative chronology.
Industry:Mining
Geologic cross section drawn in perspective and joining control points along a sinuous line.
Industry:Mining
Geologic time determined by the placing of events in a chronologic order of occurrence; esp., time as determined by organic evolution or superposition. Compare: absolute time
Industry:Mining
Geologic time measured in terms of years by radioactive decay of elements. Compare: relative time
Industry:Mining
Geology as practiced by direct observation in the field; original, primary reconnaissance; field work.
Industry:Mining
Geophysical prospecting instruments that measure the electrical characteristics of rocks.
Industry:Mining